/* Parse command line arguments for bison,
   Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc.

This file is part of Bison, the GNU Compiler Compiler.

Bison is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

Bison is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Bison; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */




#include <stdio.h>
#include "getopt.h"
#include "system.h"
#include "files.h"

int verboseflag;
int definesflag;
int debugflag;
int nolinesflag;
char *spec_name_prefix; /* for -p.  */
char *spec_file_prefix; /* for -b. */
extern int fixed_outfiles;/* for -y */

extern char *program_name;
extern char *version_string;

extern void fatal();

struct option longopts[] =
{
    {"debug", 0, &debugflag, 1},
    {"defines", 0, &definesflag, 1},
    {"file-prefix", 1, 0, 'b'},
    {"fixed-output-files", 0, &fixed_outfiles, 1},
    {"help", 0, 0, 'h'},
    {"name-prefix", 1, 0, 'a'},
    {"no-lines", 0, &nolinesflag, 1},
    {"output", 1, 0, 'o'},
    {"output-file", 1, 0, 'o'},
    {"verbose", 0, &verboseflag, 1},
    {"version", 0, 0, 'V'},
    {"yacc", 0, &fixed_outfiles, 1},
    {0, 0, 0, 0}
};

void
usage (stream)
FILE *stream;
{
    fprintf (stream, "\
    Usage: %s [-dhltvyV] [-b file-prefix] [-o outfile] [-p name-prefix]\n\
	      [--debug] [--defines] [--fixed-output-files] [--no-lines]\n\
	      [--verbose] [--version] [--help] [--yacc]\n\
	      [--file-prefix=prefix] [--name-prefix=prefix]\n\
	      [--output=outfile] grammar-file\n",
                        program_name);
}

void
getargs(argc, argv)
int argc;
char *argv[];
{
    register int c;

    verboseflag = 0;
    definesflag = 0;
    debugflag = 0;
    fixed_outfiles = 0;

    while ((c = getopt_long (argc, argv, "yvdhltVo:b:p:", longopts, (int *)0))
        != EOF)
    {
        switch (c)
        {
        case 0:
/* Certain long options cause getopt_long to return 0.  */
            break;

        case 'y':
            fixed_outfiles = 1;
            break;

        case 'h':
            usage (stdout);
            exit (0);

        case 'V':
            printf ("%s", version_string);
            exit (0);

        case 'v':
            verboseflag = 1;
            break;

        case 'd':
            definesflag = 1;
            break;

        case 'l':
            nolinesflag = 1;
            break;

        case 't':
            debugflag = 1;
            break;

        case 'o':
            spec_outfile = optarg;
            break;

        case 'b':
            spec_file_prefix = optarg;
            break;

        case 'p':
            spec_name_prefix = optarg;
            break;

        default:
            usage (stderr);
            exit (1);
        }
    }

    if (optind == argc)
    {
        fprintf(stderr, "%s: no grammar file given\n", program_name);
        exit(1);
    }
    if (optind < argc - 1)
        fprintf(stderr, "%s: warning: extra arguments ignored\n", program_name);

    infile = argv[optind];
}
